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The properties of aluminium and its alloys, as with most metals, are never completely uniform in all directions - some degree of anisotropy is always present. The exact nature of this anisotropy depends upon both alloy composition and process history (e.g. casting, rolling, extrusion, annealing, etc). Anisotropic properties can have a major effect on subsequent process stages, especially sheet metal forming processes such as deep drawing and stretch forming, and on in-service performance.
Learning Outcomes for this Section
After completing this section, you should be able to:
Before starting, it is important that you are familiar with the following terms: % elongation to failure; casting; density; electrical conductivity; extruding; face centred cubic crystal structure of aluminium; heat capacity; Miller index notation for directions and planes in cubic crystals; rolling; tensile stress; thermal conductivity; yield stress; Youngs Modulus;
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